Isocolus fitchi (Kieffer, 1898)

on Centaurea

gall

Rotund, unilocular, hard or fleshy swelling of 4-8 mm in the lower part of the stem, or the petiole or midrib of a ground leaf. Not infrequently several galles together, and then sometimes partially fused. Univoltine, pupation and hibernation in the gall.

host plants

Asteraceae, narrowly monophagous

Centaurea scabiosa.

synonyms

Aulax fitchi.

notes

According to Buhr the galls only occur in the stems.

references

Buhr (1964a), Dauphin & Aniotsbehere (1997a), Eady & Quinlan (1963a), Houard (1909a), Melika (2006a), Nieves-Aldrey (1984a, 2001a), Redfern & Shirley (2011a), Tavares (1905a [“Aulax fichti”]), Tomasi (2014a).

mod 23.viii.2019